\documentclass[a4paper]{scrreprt}
\usepackage{vmargin}
\setmarg{1cm}{1cm}{19cm}{25cm}
\usepackage{fancyhdr}
\pagestyle{fancy}
\rfoot{\thepage}
\lfoot{}
\cfoot{}
\rhead{}
\lhead{}
\chead{}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}
\begin{document}
\phantom{.}
%\setcounter{page}{1}
%\end{document}